fix a compiler warning

src/PlugIn.cpp

@@ -231,7 +231,7 @@ void PlugIn::generateAircraftReportMessage(const EuroScopePlugIn::CRadarTarget&
         auto iafDistance = currentPosition.DistanceTo(iafPosition);
 
         /* calculate the distance to the IAF */
-        double distanceToIaf = 0.0f, lastIafHeading = 100000.0f;
+        double distanceToIaf = 0.0f;
         for (int i = 1; i < flightPlan.GetPositionPredictions().GetPointsNumber(); ++i) {
             double distance = flightPlan.GetPositionPredictions().GetPosition(i).DistanceTo(currentPosition);
             double headingDelta = std::abs(radarTarget.GetPosition().GetReportedHeading() - flightPlan.GetPositionPredictions().GetPosition(i).DirectionTo(iafPosition));